diff --git a/libgrive/CMakeLists.txt b/libgrive/CMakeLists.txt
index 43cb74f..5648ce0 100644
--- a/libgrive/CMakeLists.txt
+++ b/libgrive/CMakeLists.txt
@@ -5,6 +5,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
 find_package(OpenSSL REQUIRED)
 find_package(JSONC REQUIRED)
 find_package(CURL REQUIRED)
+find_package(EXPAT REQUIRED)
 find_package(CppUnit)
 
 IF ( CPPUNIT_FOUND )